forked from OSchip/llvm-project
39eb2665d9
This is a patch that folds select of select to salvage some optimizations after select -> and/or folding is disabled. ``` select (select a, true, b), c, false -> select a, c, false select c, (select a, true, b), false -> select c, a, false if c implies that b is false (isImpliedCondition). ``` https://alive2.llvm.org/ce/z/ANatjt, https://alive2.llvm.org/ce/z/rv8zTB ``` sel (sel c, a, false), true, (sel !c, b, false) -> sel c, a, b sel (sel !c, a, false), true, (sel c, b, false) -> sel c, b, a ``` https://alive2.llvm.org/ce/z/U2kp-t, https://alive2.llvm.org/ce/z/bc88EE See D101191 Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D101375 |
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| .. | ||
| CMakeLists.txt | ||
| InstCombineAddSub.cpp | ||
| InstCombineAndOrXor.cpp | ||
| InstCombineAtomicRMW.cpp | ||
| InstCombineCalls.cpp | ||
| InstCombineCasts.cpp | ||
| InstCombineCompares.cpp | ||
| InstCombineInternal.h | ||
| InstCombineLoadStoreAlloca.cpp | ||
| InstCombineMulDivRem.cpp | ||
| InstCombineNegator.cpp | ||
| InstCombinePHI.cpp | ||
| InstCombineSelect.cpp | ||
| InstCombineShifts.cpp | ||
| InstCombineSimplifyDemanded.cpp | ||
| InstCombineVectorOps.cpp | ||
| InstructionCombining.cpp | ||